/*
 *
 gcc showtxt.c testiconv.c  -lmingw32 -lSDL2_test -lSDL2main -lSDL2 && a
 gcc testiconv.c  -lSDL2 -lSDL2_ttf -lSDL2_mixer -lSDL2_image && ./a.out
 Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>

 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
 arising from the use of this software.

 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely.
 */

#include <stdio.h>

#include "SDL2/SDL.h"

static size_t widelen(char *data)
{
	size_t len = 0;
	Uint32 *p = (Uint32 *) data;
	while (*p++) {
		++len;
	}
	return len;
}

int main(int argc, char *argv[])
{
	const char *formats[] = {
		"UTF8",
		"UTF-8",
		"UTF16BE",
		"UTF-16BE",
		"UTF16LE",
		"UTF-16LE",
		"UTF32BE",
		"UTF-32BE",
		"UTF32LE",
		"UTF-32LE",
		"UCS4",
		"UCS-4",
	};
	char buffer[BUFSIZ];
	char *ucs4;
	char *test[2];
	int i;
	FILE *file;
	int errors = 0;

	/* Enable standard application logging */
	SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

	if (!argv[1]) {
		argv[1] = "utf8.txt";
	}
	file = fopen(argv[1], "rb");
	if (!file) {
		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to open %s\n", argv[1]);
		return (1);
	}

	SDL_Renderer *renderer;
	char*show_str;
	renderer = (SDL_Renderer*)init_();
	while (fgets(buffer, sizeof(buffer), file)) {
		/* Convert to UCS-4 */
		size_t len;
		ucs4 = SDL_iconv_string("UCS-4", "UTF-8", buffer, SDL_strlen(buffer) + 1);
		len = (widelen(ucs4) + 1) * 4;
		for (i = 0; i < SDL_arraysize(formats); ++i) {
			test[0] = SDL_iconv_string(formats[i], "UCS-4", ucs4, len);
			test[1] = SDL_iconv_string("UCS-4", formats[i], test[0], len);
			if (!test[1] || SDL_memcmp(test[1], ucs4, len) != 0) {
				SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "FAIL: %s\n", formats[i]);
				++errors;
			}
			SDL_free(test[0]);
			SDL_free(test[1]);
		}
		test[0] = SDL_iconv_string("UTF-8", "UCS-4", ucs4, len);
		SDL_free(ucs4);
		show_str = (char*)append_str(show_str,test[0]);
		SDL_Log(test[0]);
		draw_str(renderer,0,0,show_str,240,320);
		SDL_free(test[0]);
	}
	/*printf(show_str);*/
	fclose(file);
	SDL_Delay(6000);        /* Effects only have length 5000 */
	return (errors ? errors + 1 : 0);
}

